Post on 27-Mar-2020
Getting StartedIntroductionWhat Did T. rex Taste Like? is an introduction to cladistics, the most commonly used method of classification today.Cladistics organizes living things by common ancestry and evolutionary relationships, enabling us to betterunderstand life's present diversity and evolutionary history.
Like other methods of classification, cladistics makes use of the observable features of organisms. Cladistics alsoallows us to examine the ways in which features change within groups, and to observe patterns of origin anddiversification over time. Unlike any other method of classification, cladistics is a powerful predictive tool, allowingus to propose hypotheses about the relationships between organisms.
This module presents a simplified version of the process used to generate cladistic analyses and demonstrates itspredictive power. Typically dozens or even hundreds of features are examined before a cladogram is produced.Although in this module only structural features are used, true cladistic analyses also use biochemical, genetic andeven behavioral features.
Time RequirementsTeacher Preparation: 45-60 minutes to review the Teacher's Guide and TourTour: 3-4 class periods (dependent on student learning and reading levels)
Grade Level7-12
This recommendation is dependent on student learning and reading levels. This module contains a moderate amountof detail and some new vocabulary.
Preparation
Name PeriodDateScience
What Did T. rex Taste Like?An introduction to how life is related
Log onto:http://www.ucmp.berkeley.edu/education/explorations/tours/Trex/navigation.htmlFollow the instructions and complete the handouts as you go. If you see a hypertext word which youwould like to see defined you can either click on the word or look at the Terms List below.
Page 1 of 4
Terms ListAmniotic egg: an egg that can be laid on land due to the presence of a fluid-filled amniotic
sac that cushions and protects the developing embryoBipedal: describing an animal that typically walks on two legs.Bony skeleton: a skeleton formed from hardened bone, not cartilage.Common ancestor: an ancestor shared by two or more lineages.Genealogy: a family history.Hypothesis: a statement suggesting an explanation for an observation.Lineage: any continuous line of descent;those organisms connected by heredity from
ancestor to descendent.Most recent common ancestor: the most recently shared ancestor of two or more
lineages.Quadrupedal: describing an animal that typically walks on four legs.Tetrapod: an animal having four limbs for terrestrial locomotion.Vertebrate: an animal having a back bone or spinal column.
What did Trex Taste Like.cwkkew 04/02
Name
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Add
ition
al D
ata
Name
Special Assignment: Solving T. rex's Identity CrisisPurpose:Use direct and indirect evidence to make inferences about T. rex .Materials needed: * Cladogram with additional data * Your Data Table
Que
stion
Is th
ere e
noug
h da
ta to
mak
e a
hypo
thes
is?
My
hypo
thes
is is:
The j
ustif
icat
ion
for m
y hy
poth
esis
is ba
sed
on th
e ob
serv
ation
that:
In o
rder
to su
ppor
t or
refu
te m
y hy
poth
esis,
I w
ould
nee
d da
ta ab
out:
Did
T. r
ex
have
an
amni
otic
egg?
Was
T. r
ex
war
m-b
lood
ed
or co
ld-
bloo
ded?
Coul
d T.
rex
have
had
fe
athe
rs?
Did
T. r
ex
have
colo
r vi
sion?
How
man
y ch
ambe
rs w
ere
ther
e in
T.
rex's
hea
rt?
Did
T. r
ex
sing
to it
s of
fspr
ing?
Wha
t did
T.
rex
taste
like?
Name
Post-TestWhat Did T. rex Taste Like?Directions: Please answer each of the following questions.
1. What is a cladogram?
2. Draw a cladogram with a frog, cow, and horse correctly placed.
3. Please circle the answer that best completes this statement: A "common ancestor" is:a . one that is very commonly seen in the fossil record.b . one that is shared by two or more organisms.c . one that has no distinguishing features and is therefore very "common."
4. Read the following statements then answer the question below.A. All organisms inherit features from their ancestors.B. Organisms resemble their most recent ancestors more closely than distant ancestors.C. Over time evolution occurs and features change.
Which of these statements are accurate?a . A and C.b . B and C.c . All of the above.d . None of the above.
5. Examine the following diagram. Which of the following statements are correct? (Circle all correct statements)
a . Crocodiles are more closely related to frippities than to squirrels.b . Frippities share a more recent ancestor with Triceratops than with Pigeons.c . Frippities probably laid eggs.d . All of these animals share the same ancestor.
http://www.ucmp.berkeley.edu/education/explorations/tours/Trex/guide/posttest.html
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